Henri armand joseph manourt



UNITED STATES PATENT OFFICE HENRI ARMANn JOSEPH'MANOURY, OF PARIS, FRANCE.

PROCESS OF DEFECATING SUGAR-JUICES.

SPECIFICATION forming part of Letters Patent No. 601,305, dated March 29, 1898.

Application filed June 23, 1897. Serial No. 641,948. (No specimens.) Patented in France September 29, 1896, No. 260,081; in Belgium November 9, 1896, No. 124,496; in Germany November 11, 1896,No. 18,892; in Spain November 17, 1896,110- 19,954; in Russia. November 27, 1896, No. 694; in Austria November 30, 1896, No. 46/5,191, and in Hungary April15,

1 outs in France, No. 260,081, dated September 29, 1896, patent of addition, dated October 31 1896; in Belgium, No.124,496, dated November 9, 1896; in Spain, No. 19,954,dated November 17 1896; in Germany, dated November 11,

1896, Serial No. M. 13,392 /89'6; in Austria, No. 46/5,I91, dated November 30, 1896; in Hungary, No. 8,009, dated April 15, 1897, and in Russia, Serial No. 694, dated'November l5 and 27, 1896,) of which the following is a specification.

This invention relates to an improved method of utilizing molasses in the manufacture of sugar; and it has for its object to'furnish simple and practical means for crystallizing and obtaining as first sugarthat is to say, by means of a single boiling almost the whole sugar contained in the beet root or sugar-canewhile reducing to a large extent the quantity offinal molasses ordinarily produced.

It consists, essentially, in introducing into the beet-root juice or cane-juice a suitable proportion of liquids more or less rich in sugar from the centrifuging of the masse-cuite after they have been subjected to the action of an alkaline earthy base, such as baryta, strontia,

or lime.

. the more or less rich drain-syrups aforesaid,

which I treat with the alkaline earthy bases and then add to the juice of beet-root or cane, and .the poorer liquids obtained at the commencement of the centrifuging may be introduced with advantage into the boiling-down pan toward the end of the boiling in a proportion dependent on the degree of poverty of sugar which it is desired to obtain in the mother-liquor of crystallization of the sugar.

I may also indicate that I am not unaware that alkaline earthy base ssuch as baryta, strontia, or 1ime.have been alreadyemployed for converting into sucrate the sugar contained in the liquids or syrups arising from the centrifuging of the masse-cuite and that this insoluble sucrate after having been separated by suitable filtration and washed was then decomposed by carbonic acid or even 1 utilized for purifying the juice of beet-root or cane; but in my improved process I do not propose to form sucrate of lime, baryta, or strontia. On the contrary, I employ these alkaline earthy bases only in a suitable proportion for obtaining a kind of purification as a result of the following observations.

I have ascertained that the alkaline earthy basessuch as baryta, lime, or strontia-introduced into the liquids arising from the centrifuging are substituted for the potash and soda existing in the organic or mineralcompounds which are contained in these liquids, forming insoluble compounds, and that on the other hand the potash and soda thus set at liberty may be in turn eliminated by means of albuminoid substances contained in the beet-root oroane juice, the coagulation of which resulting from the action of the said alkalies (potash and soda) and of heat removes these alkalies in the form of insoluble or soluble compounds in the coagulum obtained.

I will now describe the method of carrying ject to be obtained, and I operate in the following manner: In a tank provided with a steam-agitator I prepare a solution containing fifteen kilograms of baryta per one hundred kilograms of water. The proportion of this solution which must be added to the rich liquids hereinbefore mentioned is variable according as they are more or less impure. Generally speaking, this quantity must be such that these liquids receive a quantity of baryta equal to about five per cent. of their weight. The baryta liquid prepared in the manner mentioned is run into the crude juice of beet-root or cane before or after it has received the quantity of lime usually necessary for the carbonation. This addition of barytie liquid is preferably effected at two periodsat the commencement of the two ordinary periods of the carbonation-and is carried out in the following manner: By the first action of the carbonic acid the excess of alkaline earthy base free or in combination with the sugar is precipitated. Then the corbonation is arrested in such a way that the liquid is still strongly alkaline, which maintains the insolubility of the barytic organic or mineral insoluble compounds hereinbefore mentioned. Then the clear juice is separated by filtration in filter-presses from the precipitate formed. This clear juice is then subjected to a second carbonation with the addi-' tion of a fresh quantity of barytic liquid, and after this fresh ebullition the mass is again passed through filter-presses in order to separate the precipitate from the clear juice, which then undergoes the ordinary operations of evaporation and boiling.

As already stated, I prefer to complete the operation by introducing into the boilingdown pan, toward the end of the boiling, a quantity of poor liquids arising from the centrifuging of the previously-formed massecuite with a view to rendering more fluid the pasty mass contained at this moment in the boiling-down pan, thus facilitating the crystallization of the sugar contained in the mother-liquor.

\Vhen only stained sugar intended for refining purposes is made, the centrifuging includes no clarifying with water or steam, and only liquors poor in sugar are obtained. In this case these poor liquors are treated, as before, with a solution of baryta in such a way as to introduce about five kilograms of crystallized baryta per one hundred liters of the said poor liquors, and only about two liters of these alkaline liquids per one hundred liters of juice are introduced before or after they have received the lime necessary for the carbonation.

In the description just given I have indicated that the drainings of the centrifuging were rendered alkaline by means of alkaline earthy bases before being introduced into the crude beet-root juice; but it must be thoroughly understood that these drainings may be mixed directly with the said juice and alkaline earthy bases be caused to act in suitable proportions on the mixture obtained, and that it is also possible to introduce first the alkaline earthy bases into the saccharine juice and to then add a suitable quantity of the drainings from the centrifuging. The result obtained remains evidently the same in both cases. It is therefore evident that as the process has for its effect the elimination at little expense of a considerable proportion of the foreign organic and mineral matters or substances contained in the drainings from the centrifuging there results 011 the one hand a crystallization in the form of first sugar of a greater part of the sugar contained in the beet-root or cane and on the other hand a reduction in the quantity of final molasses to a degree which has never yet been attained with the improved methods of sugar manufacture at present in use.

I declare that what I claim is- The herein-described method of utilizing molasses in the manufacture of sugar, consisting in introducing into the crude juice before carbonation a suitable proportion of drainings from the eentrifugin g of the massecuite with the addition of baryta in suitable proportions.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

HENRI ARMAND JOSEPH MANOURY.

IVitnesses:

LoUls TAILFER, JACQUES CoNDsINY. 

